Electrical Troubleshooting - Honeywell F50F Manual

when the collector section is clean. The sensitivity to trig-
ger the WASH LED can be reduced so the time between
cell washings is increased.
!
WARNING
ELECTRIC SHOCK HAZARD.
CAN CAUSE PERSONAL INJURY.
Only a trained service technician should perform
the following procedure.
!
WARNING
ELECTRIC SHOCK HAZARD.
CAN CAUSE PERSONAL INJURY
OR EQUIPMENT DAMAGE.
The following procedures expose hazardous live
parts. Disconnect from power between checks
and proceed carefully. The instructions are for
use only by qualified personnel.
TOOLS AND EQUIPMENT
Troubleshooting the electronic air cleaner requires:
• Needlenose pliers for stringing ionizer wires and
inserting edge connectors.
• Test meter.
NEON LIGHT (On Power Box)
The neon light is powered through the power supply
and is on when the power supply output voltage is normal.
TEST BUTTON
When pushed, the test button shorts from collector volt-
age to ground. The resulting arcing sound indicates that
high voltage is being supplied to the collector. The solid
state power supply controls current flow to the collector.
On air cleaners with a W8600E, the CHECK LED will
come on when the test button is held down.
SERVICE • ELECTRICAL TROUBLESHOOTING
To reduce the WASH LED sensitivity:
1. Unplug or disconnect power to the air cleaner.
2. Open the access door.
3. Remove the power box cover. See Fig. 21.
4. Find the R43 resistor on the power supply and clip it
out. See Fig. 22. Make sure the leads are separated and
cannot touch.
5. Replace the power supply cover and access the door.
Turn on the power.
6. Repeat the Checkout procedure before leaving the job.

Electrical Troubleshooting

CHECK LED (Air Cleaners with W8600E)
The CHECK LED is on the W8600E. It lights to indicate
the following problems: excessive dirt loading (beyond
that required to activate the WASH LED), partial shorting
of the collector, continuous ionizer or collector arcing,
power supply failure, excessive ionizer current, or any
condition causing a major reduction in high voltage.
POWER BOX
!
WARNING
ELECTRIC SHOCK HAZARD.
CAN CAUSE PERSONAL INJURY.
Always turn off power and remove access door
before removing power supply or its cover.
The solid state power supply within the power supply
box can be replaced. When troubleshooting indicates a
power supply or solid state performance indicator problem,
replace the entire power box or replace the power supply
within the box. See Installation Instructions, form 69-0776.
See Fig. 21 for power box removal.
TROUBLESHOOTING PROCEDURE
The electronic air cleaner Troubleshooting charts show
how to quickly isolate a problem in the air cleaner. Al-
though a meter is needed for some steps, the primary
diagnostic tools are the neon light and the test button. See
Fig. 23.
17
F50F
68-0137B—2